A tiny planet in Other World where King Kai, Bubbles and Gregory live. It has ten times the gravity of Earth.
When the deceased Goku arrived for training, King Kai used the planet's gravity as part of the exercises, having Goku chase his pet monkey, Bubbles, and try to hit the speedy grasshopper Gregory with a heavy mallet, all while still wearing his weighted training gear.
Yamcha, Tien, Chiaotzu and Piccolo would later come to the planet after their own demises for similar training. The Ginyu Force were also secretly invited by King Kai, who hoped to test his new pupils' skills.
The planet was destroyed when Goku brought the villain Cell there, who used a self-destruct move to explode, killing Goku, King Kai, Bubbles and Gregory.